Crater of Diamonds State Park is the only place on the North American continent where you can dig for diamonds for a small fee and keep what you find. Some of the more notable Arkansas diamonds found include: the 40.23-carat "Uncle Sam"--the largest diamond ever unearthed in the United States, the 16.37-carat "Amarillo Starlight," the 15.33-carat "Star of Arkansas," and the 4.25-carat "Kahn Canary" diamond, found in 1977, which was worn by Hillary Clinton during the presidential inaugural balls as well as for two gubernatorial inaugurations. The 3.03-carat "Strawn-Wagner Diamond," found in 1990 was cut to a 1.09-carat gem graded D-flawless 0/0/0 (the highest grade a diamond can achieve) by the American Gem Society. This fascinating geological area of Arkansas is also home to some of the finest quartz crystal deposits on Earth. Check out this helpful two-day itinerary to enjoy sifting for diamonds and a little lake time.